16% is the change from 500 to 580
Calculation steps:
[( 580 - 500 ) ÷ 500] x 100 = 16%
Formula
Percentage change = [(580 - 500) / 500] x 100
Subtract the new number by the original number
580 - 500 = 80
80 ÷ 500 = 0.16
0.16 x 100 = 16%
Example